CVE-2020-11494

MEDIUM

4.4

CVSS v3

Description

An issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2. It allows attackers to read uninitialized can_frame data, potentially containing sensitive information from kernel stack memory, if the configuration lacks CONFIG_INIT_STACK_ALL, aka CID-b9258a2cece4.

CWE-908 CWE-909

How to fix

Remediation Available

linuxDebian

Fixed in:5.5.17-1CVE-2020-11494

awsUbuntu

Fixed in:4.4.0-1098LSN-0067-1

Fixed in:4.4.0-1098LSN-0072-1

Fixed in:4.4.0-1098LSN-0068-1

Fixed in:4.15.0-1054LSN-0068-1

Fixed in:4.15.0-1054LSN-0067-1

Fixed in:4.15.0-1054LSN-0072-1

Fixed in:5.4.0-1009LSN-0072-1

azureUbuntu

Fixed in:5.0.0-1025LSN-0067-1

Fixed in:5.4.0-1010LSN-0072-1

gcpUbuntu

Fixed in:5.0.0-1025LSN-0067-1

Fixed in:5.4.0-1009LSN-0072-1

generic-4.15Ubuntu

Fixed in:4.15.0-69LSN-0068-1

Fixed in:4.15.0-69LSN-0067-1

Fixed in:4.15.0-69LSN-0072-1

generic-4.4Ubuntu

Fixed in:4.4.0-168LSN-0068-1

Fixed in:4.4.0-168LSN-0072-1

Fixed in:4.4.0-168LSN-0067-1

Fixed in:4.4.0-168LSN-0068-1

generic-5.4Ubuntu

Fixed in:5.4.0-26LSN-0072-1

linuxUbuntu

Fixed in:4.4.0-179.209USN-4364-1

Fixed in:4.15.0-101.102USN-4363-1

linux-awsUbuntu

Fixed in:4.4.0-1067.71USN-4364-1

Fixed in:4.4.0-1107.118USN-4364-1

Fixed in:4.15.0-1067.71USN-4363-1

linux-aws-5.3Ubuntu

Fixed in:5.3.0-1019.21~18.04.1USN-4369-1

linux-aws-hweUbuntu

Fixed in:4.15.0-1067.71~16.04.1USN-4363-1

linux-azureUbuntu

Fixed in:4.15.0-1083.93~16.04.1USN-4363-1

linux-azure-4.15Ubuntu

Fixed in:4.15.0-1083.93USN-4363-1

linux-azure-5.3Ubuntu

Fixed in:5.3.0-1022.23~18.04.1USN-4369-1

linux-gcpUbuntu

Fixed in:4.15.0-1071.81~16.04.1USN-4363-1

linux-gcp-5.3Ubuntu

Fixed in:5.3.0-1020.22~18.04.1USN-4369-1

linux-gke-4.15Ubuntu

Fixed in:4.15.0-1059.62USN-4363-1

linux-gke-5.0Ubuntu

Fixed in:5.0.0-1037.38USN-4368-1

linux-gke-5.3Ubuntu

Fixed in:5.3.0-1020.22~18.04.1USN-4369-1

linux-hweUbuntu

Fixed in:4.15.0-101.102~16.04.1USN-4363-1

Fixed in:5.3.0-53.47~18.04.1USN-4369-1

linux-image-4.15.0-101-genericUbuntu

Fixed in:4.15.0-101.102~16.04.1USN-4363-1

Fixed in:4.15.0-101.102USN-4363-1

linux-image-4.15.0-101-generic-lpaeUbuntu

Fixed in:4.15.0-101.102~16.04.1USN-4363-1

Fixed in:4.15.0-101.102USN-4363-1

linux-image-4.15.0-101-lowlatencyUbuntu

Fixed in:4.15.0-101.102~16.04.1USN-4363-1

Fixed in:4.15.0-101.102USN-4363-1

linux-image-4.15.0-1039-oracleUbuntu

Fixed in:4.15.0-1039.43~16.04.1USN-4363-1

Fixed in:4.15.0-1039.43USN-4363-1

linux-image-4.15.0-1059-gkeUbuntu

Fixed in:4.15.0-1059.62USN-4363-1

linux-image-4.15.0-1060-kvmUbuntu

Fixed in:4.15.0-1060.61USN-4363-1

linux-image-4.15.0-1062-raspi2Ubuntu

Fixed in:4.15.0-1062.66USN-4363-1

linux-image-4.15.0-1067-awsUbuntu

Fixed in:4.15.0-1067.71~16.04.1USN-4363-1

Fixed in:4.15.0-1067.71USN-4363-1

linux-image-4.15.0-1071-gcpUbuntu

Fixed in:4.15.0-1071.81~16.04.1USN-4363-1

linux-image-4.15.0-1079-snapdragonUbuntu

Fixed in:4.15.0-1079.86USN-4363-1

linux-image-4.15.0-1081-oemUbuntu

Fixed in:4.15.0-1081.91USN-4363-1

linux-image-4.15.0-1083-azureUbuntu

Fixed in:4.15.0-1083.93~16.04.1USN-4363-1

Fixed in:4.15.0-1083.93USN-4363-1

linux-image-4.4.0-1067-awsUbuntu

Fixed in:4.4.0-1067.71USN-4364-1

linux-image-4.4.0-1071-kvmUbuntu

Fixed in:4.4.0-1071.78USN-4364-1

linux-image-4.4.0-1107-awsUbuntu

Fixed in:4.4.0-1107.118USN-4364-1

linux-image-4.4.0-1133-raspi2Ubuntu

Fixed in:4.4.0-1133.142USN-4364-1

linux-image-4.4.0-1137-snapdragonUbuntu

Fixed in:4.4.0-1137.145USN-4364-1

linux-image-4.4.0-179-genericUbuntu

Fixed in:4.4.0-179.209~14.04.1+signed1USN-4364-1

Fixed in:4.4.0-179.209USN-4364-1

linux-image-4.4.0-179-generic-lpaeUbuntu

Fixed in:4.4.0-179.209~14.04.1USN-4364-1

Fixed in:4.4.0-179.209USN-4364-1

linux-image-4.4.0-179-lowlatencyUbuntu

Fixed in:4.4.0-179.209~14.04.1+signed1USN-4364-1

Fixed in:4.4.0-179.209USN-4364-1

linux-image-4.4.0-179-powerpc-e500mcUbuntu

Fixed in:4.4.0-179.209~14.04.1USN-4364-1

Fixed in:4.4.0-179.209USN-4364-1

linux-image-4.4.0-179-powerpc-smpUbuntu

Fixed in:4.4.0-179.209~14.04.1USN-4364-1

Fixed in:4.4.0-179.209USN-4364-1

linux-image-4.4.0-179-powerpc64-embUbuntu

Fixed in:4.4.0-179.209~14.04.1USN-4364-1

Fixed in:4.4.0-179.209USN-4364-1

linux-image-4.4.0-179-powerpc64-smpUbuntu

Fixed in:4.4.0-179.209~14.04.1USN-4364-1

Fixed in:4.4.0-179.209USN-4364-1

linux-image-5.0.0-1037-gkeUbuntu

Fixed in:5.0.0-1037.38USN-4368-1

linux-image-5.0.0-1052-oem-osp1Ubuntu

Fixed in:5.0.0-1052.57USN-4368-1

linux-image-5.3.0-1018-oracleUbuntu

Fixed in:5.3.0-1018.20~18.04.1USN-4369-1

linux-image-5.3.0-1019-awsUbuntu

Fixed in:5.3.0-1019.21~18.04.1USN-4369-1

linux-image-5.3.0-1020-gcpUbuntu

Fixed in:5.3.0-1020.22~18.04.1USN-4369-1

linux-image-5.3.0-1020-gkeUbuntu

Fixed in:5.3.0-1020.22~18.04.1USN-4369-1

linux-image-5.3.0-1022-azureUbuntu

Fixed in:5.3.0-1022.23~18.04.1USN-4369-1

linux-image-5.3.0-53-genericUbuntu

Fixed in:5.3.0-53.47~18.04.1USN-4369-1

linux-image-5.3.0-53-generic-lpaeUbuntu

Fixed in:5.3.0-53.47~18.04.1USN-4369-1

linux-image-5.3.0-53-lowlatencyUbuntu

Fixed in:5.3.0-53.47~18.04.1USN-4369-1

linux-image-awsUbuntu

Fixed in:4.4.0.1067.68USN-4364-1

Fixed in:4.4.0.1107.111USN-4364-1

Fixed in:5.3.0.1019.20USN-4369-1

linux-image-aws-edgeUbuntu

Fixed in:5.3.0.1019.20USN-4369-1

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1067.67USN-4363-1

linux-image-aws-lts-18.04Ubuntu

Fixed in:4.15.0.1067.70USN-4363-1

linux-image-azureUbuntu

Fixed in:4.15.0.1083.82USN-4363-1

Fixed in:5.3.0.1022.22USN-4369-1

linux-image-azure-edgeUbuntu

Fixed in:4.15.0.1083.82USN-4363-1

Fixed in:5.3.0.1022.22USN-4369-1

linux-image-azure-lts-18.04Ubuntu

Fixed in:4.15.0.1083.54USN-4363-1

linux-image-gcpUbuntu

Fixed in:4.15.0.1071.77USN-4363-1

Fixed in:5.3.0.1020.19USN-4369-1

linux-image-gcp-edgeUbuntu

Fixed in:5.3.0.1020.19USN-4369-1

linux-image-genericUbuntu

Fixed in:4.4.0.179.187USN-4364-1

Fixed in:4.15.0.101.91USN-4363-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.101.108USN-4363-1

linux-image-generic-hwe-18.04Ubuntu

Fixed in:5.3.0.53.109USN-4369-1

linux-image-generic-lpaeUbuntu

Fixed in:4.4.0.179.187USN-4364-1

Fixed in:4.15.0.101.91USN-4363-1

linux-image-generic-lpae-hwe-16.04Ubuntu

Fixed in:4.15.0.101.108USN-4363-1

linux-image-generic-lpae-hwe-18.04Ubuntu

Fixed in:5.3.0.53.109USN-4369-1

linux-image-generic-lpae-lts-xenialUbuntu

Fixed in:4.4.0.179.158USN-4364-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.179.158USN-4364-1

linux-image-gkeUbuntu

Fixed in:4.15.0.1071.77USN-4363-1

Fixed in:4.15.0.1059.63USN-4363-1

linux-image-gke-4.15Ubuntu

Fixed in:4.15.0.1059.63USN-4363-1

linux-image-gke-5.0Ubuntu

Fixed in:5.0.0.1037.25USN-4368-1

linux-image-gke-5.3Ubuntu

Fixed in:5.3.0.1020.10USN-4369-1

linux-image-gkeop-5.3Ubuntu

Fixed in:5.3.0.53.109USN-4369-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1071.71USN-4364-1

Fixed in:4.15.0.1060.60USN-4363-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.179.187USN-4364-1

Fixed in:4.15.0.101.91USN-4363-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.101.108USN-4363-1

linux-image-lowlatency-hwe-18.04Ubuntu

Fixed in:5.3.0.53.109USN-4369-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.179.158USN-4364-1

linux-image-oemUbuntu

Fixed in:4.15.0.101.108USN-4363-1

Fixed in:4.15.0.1081.85USN-4363-1

linux-image-oem-osp1Ubuntu

Fixed in:5.0.0.1052.55USN-4368-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1039.32USN-4363-1

Fixed in:5.3.0.1018.19USN-4369-1

linux-image-oracle-lts-18.04Ubuntu

Fixed in:4.15.0.1039.48USN-4363-1

linux-image-powerpc-e500mcUbuntu

Fixed in:4.4.0.179.187USN-4364-1

linux-image-powerpc-e500mc-lts-xenialUbuntu

Fixed in:4.4.0.179.158USN-4364-1

linux-image-powerpc-smpUbuntu

Fixed in:4.4.0.179.187USN-4364-1

linux-image-powerpc-smp-lts-xenialUbuntu

Fixed in:4.4.0.179.158USN-4364-1

linux-image-powerpc64-embUbuntu

Fixed in:4.4.0.179.187USN-4364-1

linux-image-powerpc64-emb-lts-xenialUbuntu

Fixed in:4.4.0.179.158USN-4364-1

linux-image-powerpc64-smpUbuntu

Fixed in:4.4.0.179.187USN-4364-1

linux-image-powerpc64-smp-lts-xenialUbuntu

Fixed in:4.4.0.179.158USN-4364-1

linux-image-raspi2Ubuntu

Fixed in:4.4.0.1133.133USN-4364-1

Fixed in:4.15.0.1062.60USN-4363-1

linux-image-snapdragonUbuntu

Fixed in:4.4.0.1137.129USN-4364-1

Fixed in:4.15.0.1079.82USN-4363-1

linux-image-snapdragon-hwe-18.04Ubuntu

Fixed in:5.3.0.53.109USN-4369-1

linux-image-virtualUbuntu

Fixed in:4.4.0.179.187USN-4364-1

Fixed in:4.15.0.101.91USN-4363-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.101.108USN-4363-1

linux-image-virtual-hwe-18.04Ubuntu

Fixed in:5.3.0.53.109USN-4369-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.179.158USN-4364-1

linux-kvmUbuntu

Fixed in:4.4.0-1071.78USN-4364-1

Fixed in:4.15.0-1060.61USN-4363-1

linux-lts-xenialUbuntu

Fixed in:4.4.0-179.209~14.04.1USN-4364-1

linux-oemUbuntu

Fixed in:4.15.0-1081.91USN-4363-1

linux-oem-osp1Ubuntu

Fixed in:5.0.0-1052.57USN-4368-1

linux-oracleUbuntu

Fixed in:4.15.0-1039.43~16.04.1USN-4363-1

Fixed in:4.15.0-1039.43USN-4363-1

linux-oracle-5.3Ubuntu

Fixed in:5.3.0-1018.20~18.04.1USN-4369-1

linux-raspi2Ubuntu

Fixed in:4.4.0-1133.142USN-4364-1

Fixed in:4.15.0-1062.66USN-4363-1

linux-snapdragonUbuntu

Fixed in:4.4.0-1137.145USN-4364-1

Fixed in:4.15.0-1079.86USN-4363-1

lowlatency-4.15Ubuntu

Fixed in:4.15.0-69LSN-0067-1

Fixed in:4.15.0-69LSN-0068-1

Fixed in:4.15.0-69LSN-0072-1

lowlatency-4.4Ubuntu

Fixed in:4.4.0-168LSN-0072-1

Fixed in:4.4.0-168LSN-0068-1

Fixed in:4.4.0-168LSN-0067-1

Fixed in:4.4.0-168LSN-0068-1

Fixed in:4.4.0-168LSN-0072-1

lowlatency-5.4Ubuntu

Fixed in:5.4.0-26LSN-0072-1

oemUbuntu

Fixed in:4.15.0-1063LSN-0072-1

Fixed in:4.15.0-1063LSN-0067-1

Fixed in:4.15.0-1063LSN-0068-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.72%probability of exploitation in 30 days

51stpercentile

Moderate risk: more likely to be exploited than 51% of all known CVEs.

References

Patch2

Third-Party Advisory11

Related Vulnerabilities

Other CWE-908 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2023-24941	Critical	9.8	95%	-	Fix
CVE-2007-1751	High	9.3	61%	-	-
CVE-2008-0081	Critical	9.8	58%	-	-
CVE-2020-1934	Medium	5.3	52%	-	Fix
CVE-2008-3475	High	8.8	40%	-	-

Common questions

How do I fix CVE-2020-11494?

Published advisories record a fix for 112 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2020-11494 being actively exploited?

Not that we know of. CVE-2020-11494 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.72% is the estimated probability that it will be exploited in the next 30 days. That is higher than 51% of all scored CVEs.

How severe is CVE-2020-11494?

CVE-2020-11494 has a CVSS v3 base score of 4.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2020-11494 affect?

Published advisories record a fix for linux (Debian), aws (Ubuntu), azure (Ubuntu), gcp (Ubuntu), and 108 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2020-11494

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.